28.The technique of spectroscopy allows analyst of incoming light after it has been separated into its component wavelengths by passage through a prism.
by +动名词不是吗?为何名词passage也可以呢?
原帖由 tomatopotato 于 2006-1-3 10:15 发表
28.The technique of spectroscopy allows analyst of incoming light after it has been separated into its component wavelengths by passage through a prism.
by +动名词不是吗?为何名词p ...
First, by + doing and by+n. both are right
second,passage+through is right too, you can find this usage in Oxford Dictionary